remde



April 6 1926.

E. H. REMDE SAFETY MECHANISM Filed Sept. 18, 1922 2 Shgets-Sheet '1 A i s 1926 1,579,455

E. H. RE MDE SAFETY MECHANISM File d Sept. 18, 1922 2. Si! 1 e etsSheet 2 4 Z 0" awuewtoz Patented Apr. 6, 1926. c

EDWARD- H':

Kama, on: cL aaELANn; QHIO;-.ASSI1GNQB 'IIOgTHEl BAKER-.RAULANG; COMBAMY, on cnnzvnmm, v01110;;n ieonzeixmnom 01, I .oHIo

- sum M flB sm-c 7 will at; 710m it, may; c oneeme Be it. known that. I, E'Dwam) State tv Ohio, haveinizenteclfjcettain new and useful linmioteinents'in and: Relating to Safety MZQClia-ni'sm ole" theifOllQW-i tnolling the operation otfthe vehicle whereby accidents are. 'aYQi BdLf One object of. the inve an improved, sextet simple;constnuctibn, v

Anothez ohje ct o'f the inyentio'n is -te as};

soeiat-e with the-operating membersii for the vehicle an. automaticsatety Ineehanism, hay-Q ingv .solenoi'cl' and electric, circuits which are;

opened and closed: by sai'dl members to en ergize and tie-energize the solenoidg so. that in, the eventthe openat ve-c leavesithe veh cle While it is in. motionthevehifcle Willatutm tor the vehicle is returned? to ltS IIOIlIIalQOI' neutral position.

Other eb ects oi the inventibnv Will. be.

apparent to those skilledin. theant to-Which my invention relates-from the following tle-. SCl'lPtlOll taken in Connection with. the. ac; con'ipanying Cll%1.Wll1gS,lillelielll Fig. 191s. a; fira-gnientaryz-view of a. V6-

hicle-having a safety mechanism. embodying I necteclltqantlfeperates a braking nechani'sn eleasingpeclal. 7 i

Fig, 3". 1s a; sectional View. of theswitch which is. open and. closed. by thecontrollen.

Fig; 3 is asection. on. the; line 3"] 3." of.

Fig. 3e.

noich H- R MDE a citizen of the Unitel States, nesidingfat] Cleveland, in tlieconnty of'CuyahegaL and,

to vehicle, more I tion "is. to, provide. 1s mechanism of; relatiwelfy atcneenct a] pai'r- OinPrightsB.

lights SL'sn Port ,4: to which is S87] V in any well; known manners con-' i Q I porting a shaft 8, onwhiei L1 1g. Qis aifiiaginentary. side elevation of" Fig. 4. is a front, elevatibnofl the solenoicl,-i V

i niay he applied to the Wheels otfthe-vehicle Fig; 5 is asideekvation ofi i l ic Figs 6 is a bottom. plan view of the. sole;

Fig, 8 is a'secltionfon the z line 8 8 of F1 9 1s ajdfiagiani of the electrical 0111- cnits for CO1 rolling the V solenoid 1 and througl'lit; the cu motor. I

In the drawingsl' indicates as an entirety a truck. "Whfleithave shown only a pottionof aitruc-k, it will ot'jcourse be tinderlllieftr'nk 1 comprises; a frame 2having f. 5;aiitl;alsolenoid 6,I't o whicli i'e tei nt tor thejyehicl'e driving 1 .st'oodfthatit iniay be of any desired co-nv encejwill"latfliihefmatle indicates a pair ofibracl ietsenlyone be'ingshownl) for sup Ta] platform 9 .may. be supported, IO indicates il'ever preferably fiilc rnniecl I to rock on the. shaft .The front of the lever 10 serves as a footfpedalig the rear end of the lever is connecteclite the loafer-end ofa rod; 11. The v oppositeenfclof' the rod 111 is con nectfeclf to,

a leter; 12,- piivotedlto aside plate 13"cariiecll; by. the 'adjaeent; upright 32 l lindicates a r'orl' connected; to the lever. 1Q'at one endl' andfat its 0 iesite, encl eonnecteclj to one arm-0t, a bell'cranl: The bell'ci'ank' is niount'edon a shat-H16, supported in any desired manner. The bellfcranl; I5 is coninstead of a. driven. paft vt'hef dniving mechanism, ifclesired. i

".22. indicates a coiled spring connected at n lend t somerfixe l P rt. f; e v hi fia'meQQZ The; opposite end otithesptiplg;

22 is connected in any well known manner to one of the elements of the brake operating connections between the lever 10 and the brake mechanism 16 such as the rod 14 and acts therethrough normally to apply the brake shoes or band to the wheel of the braking mechanism. As a result of this arrangement, the lever 10 is maintained in the position shown in full lines in Fig. 2; accordingly, when the operative stands on the platform 9 he can release the braking mechanism by depressing the outer end of the lever, see Fig. 2 If the operative takes his foot off the pedal. or permits it to return to normal position by reason of his getting off of the platform 9, the spring 22 will cause the braking elements to be engaged and thus prevent movement of the vehicle.

24 indicates a switch, one contact of which is connected with the solenoid 6 as will be later described. The switch contacts 24, 24 may comprise a pair of members one of which is resilient to maintain them normally separated. The movable contact of the switch 24 is disposed in the path of movement of a projecting member 26 carried by the inner end of the lever 10, so that when the latter is operated to release the brake, the contacts of the switch 24 will be engaged. The purpose of the switch 24 will be later set forth.

The controller 5 preferably comprises a rotating drum 27 that is movable from a neutral position in one direction or the other to operate the vehicle forwardly or rearwardly. The shaft 27 of the drum 27 is connected through suitable gearing (not shown) with a countershaft 28. The countershaft 28 is provided with an arm 29 to which a link 30 is pivotally connected. The link 30is connected to and operated by a suitable operating member or hand lever, not shown.

31 indicates an annular member fixed to and movable with the drum shaft 27 At one side the annular member 31 is provided with a cam 32 arranged to engage'and operate a plunger 33. The plunger 33 is slidable in an opening 34 formed in the base plate for the controller 5 and also in an opening 36 formed in a plate 37 fixed to the plate 35. The inner end of the plunger 33 arranged to engage one arm of a bell crank 38 and to actuate the latter about its fulcrui i 39. The other arm of the bell crank is operatively connected to the lower end of a rod 40. 41 indicates a bracket carrying a collar 42 which receives the rod and guides it when moved endwise in the manner about to be described. 42 indicates a switch preferably supported on a bracket 42 fixed to the dash 4. The switch 42 may be of any desired construction. The contacts 42 42*, of the switch 42 are normally separated, but are arranged to be closed by the movement of the rod 40 in an upward direction. For this purpose, the switch 42 is preferably provided with a collar or annular wall 42, which slidably supports a cap 42. The cap 42 may be formed of insulating material. The cap 42 is interposed be tween the upper end of the rod 40 and the contact 42, so that when the rod moves upwardly it will engage th'e'cap and causeit to move the contact 42 into engagement with the contact 42 The cap 42 is held within the collar 42 by a flange provided on the free edge of the collar. 43, 44, indicate leads connected to the contacts 42, 42 respectively. The purpose of the switch 42 will be later set forth. The cam 32 is so ar-' ranged angularly of the shaft 27 that when the controller drum 27 is in neutral position, it will move the plunger 33 inwardly and it in turn, through the bell crank, will. move the rod 40 upwardly, thereby causing the contacts 42, 42, of the switch 42? to engage each other, as just described. Vi hen the drum 27 is rotated in either direction, from itsneutral position, thecam 32 will allow the plunger to move outwardly, the weight of the rod 40 being snfiicient to effect such movement; accordingly the rod will move downwardly and permit the contacts of the switch 42 to disengage one from the other.

The purpose of the solenoid. 6 is to open and close the circuit 'forthe driving motor, indicated at 44, so that the latter can be operated by the operation of the controller; whereas the purpose of the switches 24 and 42 is to control the energizing and de-energizing of the solenoid 6 so that the circuit in which the controller is interposed can only be closed by the latter under certain conditions, to thereby avoid accidents and damage following anycarelessness or neglect on the part of the operative in leaving the vehicle or in the event he is thrown from the vehicle while it is in motion.

Referring to Fig. 9: This view illustrates the position of the lever 10 and the rod 40, with the switch open and switch 42 closed, as when the vehicle is standing idle. The circuit for the driving motor 44 consists of the lead 45 from on side of the battery 46 to the motor, a lead 46 from the motor 44 to the contact 4?, a conductor 48 between the contact 47 and the contact 49 (the conductor 48 being separated from the contacts 47, 49, since the solenoid 6 is de energized) and a lead 50 from the contact 49 to the other side of the battery 46. The circuit through the switch 42 consists of the lead 43 from the contact 42" to one side of the battery 46this lead being preferably connected to the lead 50, the lead 44 from the other contact 42 to one end of the solenoid winding, a lead 51 from the other images:

now it is desired tooperate the vehicle hthe operative, after gettingon the: platform 9; operates the lever -10, downwardly. TlllS- operation releases the brake and closes: the

switch 24, which completes the circuit:-v

through the leads 51,52, 43, 44, switch 4295-;

and solenoidwinding, thereby energizing the? latter. As a result, thelsolenoid corevmoves the conductor 48 into engagementwithflthe; contacts 47 and 49. The controller" 5 may' now be operated in either direction If the controlleris operated, the canr 32 wi'll ro-= tate therewith, and thus permit the rod-40'to move downwardly and allow the switch 42 to open, thereby opening-j thecircuit just re ferredto; To prevent the de energi zin-got the solenoid winding; when this circuit is. opened, I provide a lead 53 between the lead 41% oi" the solenoid winding and the contact 47, so that the circuitthrough' the solenoid winding will be completed" through the con tacts 47,49 and conductor 48,- According 1 itwill be seen that so long' as the lever 10 is inaintained in its operative position and the switch Q lclosed, the solenoid Will be en; ergized and the circuit for the'imotorwill be completed through the conductor 48 and contacts-4:7 and'49; but should thefoot be removed from the lever 10, theswit'ch 24:

will be opened and the circuit I through the leads 51, 52, 53, solenoid-winding, contact 4-7, conductor 48, contact 49' and lead 50 well: be broken and} thus result in de-energ zing the solenoid 6. It thisjoperation takes place while the controller drum is in an operated position either for forward orzre verse driving operation, it-will be impossif ble to-again close theci-rcuit just referred to by the operation of the lever 10 downward i-- 13*, since the switch 42% is'open'. However, i:t the controller is movedto its-neutral posie" tion, the cam 32 will causethe switch flrto I close, following whieh the lever 1'0I1nay be operated'to close the circuit thronglithe so-j lencid WillCllIlgflllCl thus complete the motor circuit through the-contacts 47,49 and con lnventioni relates many alterations in 00117 I structioir and wldely'difiering embodiments ductor lS. p From the foregoing description it Will-beseen that nodamage or-a'ccident can result should an operative attempt to run themhicle where previously the controller-has beenleft inan operatedposition, In order to operate-the vehicle, twoconditions mu-st" exist, namely, (=1) the controller drum 27" must be inneutral position and the lever. 10 mustbe operated to release the brake and close the switch 24. Accordingly, inathe' event the operative, after setting the vehicle in motion, falls ofl? or purposely leaves the-platform, the vehicleflcannot be set in" motion by the operation of the-leverlOfor; the reason, as already pointed out,'.iti isilfirst necessary to return the: controller druinrto' neutralpositionain order to closetheswitch It willcalsoibe seen that my construction 1s exceedingly simple. n that the circuit through: the: solenoid for energ zing it or maintaining it energized during operationv or the vehicle, is. independent of the: motor andaalso'thelniotor'circuit except in' so'far'. -l

as-the circuit for-"the: solenoid isshunted through. the; contacts 4:7, 481 v v. The solenoid G nny-be ofany 'desired'c'onstructlon but by preference it comprises the following; instrumentahtres; 54 indicates coil, preferably. supported; by a Uimembef 5 9* onpai plate 54K 55 indicates. the core.

{l9 and: conductor;

carryingfat' its. lowerend' the conductor 48. Y

56 indicates a supplemental conductor fixedf to the; conductor 48" and carrying at its;

opposite endsaipair o ficon-tactst48 r527, 57, ndicate. a pair, of. cyl nders: preferably formed integrally with theicontacts; 4 7,-

58-ind1cates a cup shaped: member.lsiidably'- mounted in; each cylinder 5 7-1'and arranged to hold a carbon contact: connected by a. i- Wll' 59Wltll the aclj'acent leada ThegcarbOIlzCOIlttlClD 5 9",is held? in p lace byte cap 60,.-

having screw threaded connection. with the" upper end of the: cup member'58 6.1;indi-"3 cates a 'springract-ingon the cap- 60: and non mally tending to push the cuplnelnbeii 58': do-wnwardly against a flange; 57 provided:

on the; "lower? end; of"; the adjacent cylinder '57. The upperyend ofi'the spring 61 abuts against: a plate 62 removably fitting. the

upper or. open end of; thelcylinder' 57. By the arrangement described, the carbon; contactsi-rernain in engagement withxthe; contacts-484until' after; the: conductor? 48; dis

engages: the contacts-'47, I 49,1thus: preventing arcing; between. these latter elements. 13v

mounting the carbon contacts- 59: to slide. iii the: cylinders 57, they wil'libe mored in: Wardl'yby the contacts 48 against the tension of the; springs; 61, when: the solenoid is engage the conductor w th: the

operated to: contacts 47,4591 4 To those skilled lIlL the arttovwhichsmy and i applications of; my invention will su gest' themselves without departing. from the spirit and scope thereof: My disclosures:

c'ombinatiomwith mechanism to be operated,

including an: electric motor, of :amotor: cir cult, .sa'idi circuittincluding alpai-rl, of contacts and i a conductor arranged to engage and disen'ga'ge saidv contactsea controller: interposed in said? circuit, apa'ir of" members, one for operating said controller and the other etfecting the operation or said mechanism, and electrically operated means associated with said members and arranged to cause said conductor to engage said contacts when one of said members is in neutral position and the other is operated.

2. In apparatus of the class described, the combination with mechanism to be operated, including an electric motor, of a motor circuit, said circuit including a pair of contacts and a conductor arranged to close and open said 'circuit through said contacts, a 'controller interposed in said circuit, a pair of members, one for operating said controller and the other effecting the operation of said mechanism, and electrically operated means associated with said members and arranged to operate said conductor when said controller operating member is in neutral position and the other is operated.

3. In apparatus of the class described, the combination with mechanism to be operated, including an electric motor, of a motor circuit, said circuit including a pair of contacts and a conductor arranged to engage and disengage said contacts, a controller interposed in said circuit, a pair oi" members, one for operating said controller and the other effecting the operation of said mechanism, and electrically operated means associated with said memb crs and arranged to cause said conductor to engage said contacts when one of said members is in neutral position and the other is operated, but arranged to be ineffective it the first mentioned member is in an operated position.

4. In apparatus of the class described, the combination with mechanism to be operated, said mechanism including an electric motor and a member controlling the operation of said mechanism, of a motor circuit including a pair of contacts and a conductor, a device interposed in said circuit arranged to'effect operation of the motor in either direction, a solenoid, the core of said solenoid being connected to said conductor and arranged to move it to close the circuit through said contacts when the solenoid winding is energized, a circuit through the solenoid winding, a pair of switches in said last mentioned circuit, one of said switches being closed when said device is in neutral position and the other switch being normally open but arranged to be closed when said member is operated, and a lead from one end or the solenoid winding to one of said contacts, whereby the circuit through'the solenoid winding will be completed during operation of said device while said member is maintained in its operated position.

5. In apparatus of the class described, the combination with mechanism to be operated, said mechanism including an electric motor and a device controlling the operation of said mechanism, of a motor circuit including a pair of contacts and a conductor, a controller interposed in said circuit, a solenoid, the core of said solenoid being connected to said conductor and arranged to move it to close the circuit through said contacts when the solenoid winding is energized, a circuit through the solenoid winding, a pair of switches in said last mentioned circuit, one of said switches being closed when the controller is in neutral position but arranged to beop'ened when the controller is operated, and the other switch being normally open but arranged to be closed when said device is operated, and a lead from one end of the solenoid winding to one of said contacts, whereby the circuit through the solenoid winding will be completed during operation ot said controller while said device is maintained in its operated position.

6. In apparatus of the class described, the combination with mechanism'to be operated, said mechanism including an electric motor and a normally applied braking means, of a member for releasing said braking means, a motor circuit including a pair of contacts and a conductor, a device int r- POZGd in said circuit for operating said motor in either direction, a solenoid, the core of said solenoid being connected to said conductor and arranged to move it to close the circuit through said contacts when the solenoid winding is energized, a circuit through the solenoid winding, a pair of switches in said last mentioned circuit, one of said switches being clo:ed when said device is in neutral position and the other switch being normally open but arranged to be closed when said member is operated, and a. lead from one end of the solenoid winding to one of said contacts, whereby the circuit through the solenoid winding will be completed during operation of said device while said member is maintained in its operated position.

7. In apparatus of the class described, the combination of an electric motor, a motor circuit including a make and break device, means in said circuit for eti eeting operation of the. motor in either direction, a normally applied braking means for said motor, a member for releasing said braking means, a solenoid, the core of said solenoid being connected to the movable element of said make and break device, a pair of switches in circuit with the winding of said solenoid, one switch being closedwhen said means are in neutral position and open when they are operated and the other switch being normal- 1y open but arranged to be closed when said member is operated, and a lead from one end of the solenoid winding to one element of said make and break device, whereby the circuit through the solenoid winding will be maintained during operation of said cirmember is: operated:

nemesis :rent supply, a controller interposed in :s'a id.

circuit, a pair ofmemh'ers, onefor operating said controller and'the'other 'eifeoting,

the operation of said mechanism, and electrio-ally opera-ted means associated with said members and COD'IIe'CtB'QlW lth said make and break device and arranged "to operate the latter in oi'iedi recti'onwhen one of sai'diirnei n-s r p lead: from that end of the solenoid winding "veii'iobe 'fi'oni its connection with the last hers is in neutral positionzfand the other In a a 'iaratus oi thecla-ss described,the con'ibination*with mechanism tobe operated, including an electric'motor, of motor circu-it and a source of current supply therefor, said circuit including a ma ke'a'nd breakdovicc, a controller:intei'poset iiiilsaid i'circuit,

a pair of members, one for operating. :su id controller and the other efiectin'g the operais tion or said mechanism, and elect 'ical'ly operate d means associated with members arranged to operate :said make and break device when one of said'membersais but arranged tobe ineffective the first mentioned member :is in an operated position.- 11 I 10. In apparatus 'ot the class described, the combinationwith mechanism 'to'be operated, said mechanism including an electric motor and a member controlling the oper-' 'ation of said mechanism, of number circuitincli-rding a-ii'ial'ze and break iievrce, imeans interposed-in said circuit and arranged' to effect operation of the moterin either direction, a solenoid, the coreof said solenoid-being 'cenneeted. to the movable member of said make and break deviceand arrangedtom'oye it into engagement with the other member thereof when the solenoid Winding is energized, a circuit through the solenoid winding, a pair of switches in said last mentioned circuit, one of said switches being closed when said operating means is in neutral position and the other switch being normally open but arranged to be closed when said controlling member is operated, and a lead from one end of the solenoid winding to one of the members of said inake and break device, whereby the circuit throughthe so lenoid winding will be completed during operation of said operating means while said member is maintained in its operated position. i V

11. In apparatus of the class described, the combination with mechanism to be open an d mechanism in lud n -endemic in neutral position and the other is operated,

moto-r a-nd a@meniber controlling the operation; ofisaidi-meclian-ism, 'oira motor circuit includingaisourcebi current supply and a make and "break device, a controller interposed insaid circuit, a solenoid, the core of saidksolenoid'being connected to the movable nremloer of said make and break 'device'and arranged to complete the circuit therethrough w henthe'solenoid winding is ener- -:gized, :a circuit, through the solenoid winding, apairof switches ingsaid last mentioned circuit, one .rofpsaid 5 switches being closed when the controllers in neutral DOSltIO'HJbUt marrang'ed :to be opened when the controller is operated,pandthe other switch being normally open. but 'ai raia'ged torbe closed when said TOOI'It-IOlliDQLDNm-bC-T is operated, and a fiifil-lilidlled v:swgitch to that member of the Jinake and break device which isidisconnec ted :itlfl'lfi said source of current supply when said device :is open, whereby the circuit tl ln-oiggzli tliesolenoid winding will be com p t Wh esa'id controllingrmeinber is-niaintained ea durum i operation .of :said controller in its p ted position.

. 1n app-aratusof the class described,

source of current supply, "aiina'ke and break device, one member thereof being connected braking means for said 2motor,ran element for operating:saidbraking means, a solenoid connected tosaid source of current supply,

the core oiz said' solenoidbeing connected to the mo al'ile-meinber of said :make and break d -f ice, 'a' Fair of: W tChGS-Jln circuit with the w-mding. of. said" solenoid, one of said ,SWiftEl-IS' bEiIIg closed when-said motor oper =atin g memisiune in neutral position and open when said meanszarre operated and; the other SWltCli being normally open but arranged to be closed when said element is operatechand a connection between that end of the solenoid winding remote from its connection with the last mentioned switch and that member of the make and break device which is connected through the motor with said source of cur-rent supply.

the combination of an "electric motor, a

13. In apparatus of' the'class described, i

the combination of a source ofcurrent supply, an eleotricmotor, a circuit for said motor connected to the opposite'sides of said source of current supply, said circuit including means for controlling the operation of the motor and a make and break device, a separate circuit connected with the oppol tildes of sa d source of current supply,

said separate circuit including a solenoid having its core connected to the movable ele- .ment of said make and break device for closing it when the solenoid winding is energized, a pair of switches in circuit with said solenoid, connections between said controlling means and one of said switches and arranged to close the latter when said controlling means are in neutral position but arranged to permit said switch to open when said means are operative, means for closing the other switch, and a connection between that end of the solenoid winding remote from its connection with the last mentioned switch and that member of the make-andbreak device which is connected to that side of said source of current supply opposite to that side to which said switch is connected.

14. In an apparatus of the class described, the combination of mechanism to be operated, an operating member effecting the operation oi said mechanism, a source of electrical energy, an electric motor, a circuit for said motor, including a controller and a malte-and-break device, a solenoid having its core connected to the movable element of.

said make-and-break device, whereby the elements thereof are engaged when the solenoid is energized, a circuit through. the winding of said solenoid, including a pair of switches, one normally open and arranged to be closed by the operation of said operating member and the other operatively connected with said controller, whereby it is closed when said controller is in neutral position and open when the controller is operated, and a shunt circuit from one end or" the solenoid winding through the make-andbre'ak device, whereby the solenoid winding is maintained energized during operation of said controller. 1

15. In apparatus of the class described, the combination with a solenoid, of a make and break device having a stationary member and a movable member, said latter member being connected to and movable by the core of said solenoid, a circuit arranged to be closed by the engagement of said members, and contacts mounted on said members, one 0t said contacts being mounted to move on the adjacent member, whereby it will.

move relative thereto when said movable member is operated to open said circuit to maintain the circuit through said make and break device until after the members thereof have separated.

16. In apparatus of the class described, the combination with a solenoid, of a pair of contacts, a conductor connected with the core of said solenoid, a circuit having leads connected to said contacts and arranged to be completed when said conductor is engaged therewith, a supplemental conductor connected to and movable with said first mentioned conductor, and separate pairs of contacts supported by said supplemental conductor and said first mentioned contacts, one of the contacts of each pair being movable relative to its support when said core is operated to disengage said first mentioned conductor from said contacts to maintain the circuit through the latter until after said conductor has become disengaged from said contacts.

17. In apparatus of the class described, the combination with a solenoid, of a pair of contacts, a conductor connected with the core of said solenoid and arranged to be moved thereby into engagement with said contacts, a pair of separate contacts carried by said conductor, a pair of cylinders each in electrical connection with one of said first mentioned contacts, and a contact element slidably mounted in each of said cylinders and arranged to engage the adjacent separate contact, said contact elements being movable a predetermined distance with said conductor, while in engagement with said separate contacts to maintain the circuit through the conductor until after it has become disengaged from said first mentioned contacts.

In testimony whereof, I have hereunto subscribed my name.

EDWARD H. REMDE.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,579,455, ranted April 6, 1926, upon the application of Edward H. Re1nde,'of Cleveland, @1110, for an improvement in Safety Mechanism, an error appears in the printed specification requiring correction as follows: Page 5, line 61, claim 10, before the word member insert the word con-trolling; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 23d day of November, A. D. 1926.

[sEAn] M. J. MOORE,

Acting Commissioner of Patents. 

